Methods for extremely sparse-angle proton tomography

Physical Review E American Physical Society (APS) 104:4 (2021) 045201


BT Spiers, R Aboushelbaya, Q Feng, MW Mayr, I Ouatu, RW Paddock, R Timmis, RH-W Wang, PA Norreys

Influences of sinusoidal density modulation on stimulated Raman scattering in inhomogeneous plasmas



Y Chen, CY Zheng, ZJ Liu, LH Cao, QS Feng, YG Chen, ZM Huang, CZ Xiao

Eigenvalue solution for the ion-collisional effects on the fast and slow ion acoustic waves in multi-ion species plasmas



ST Zhang, YZ Zhou, T Yang, R Xie, Y Jiang, SS Ban, QS Feng, YX Wang, B Qiao, ZJ Liu, LH Cao, CY Zheng

One-dimensional hydrodynamic simulations of low convergence ratio direct-drive inertial confinement fusion implosions

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences The Royal Society 379:2189 (2020) 20200224


Robert Paddock, Heath Martin, Rusko Ruskov, Robbie Scott, Warren Garbett, Brian Haines, Alex Zylstra, Ramy Aboushelbaya, Marko Mayr, Benjamin Spiers, Robin Wang, Peter Norreys


Indirect drive inertial confinement fusion experiments with convergence ratios below 17 have been previously shown to be less susceptible to Rayleigh-Taylor hydrodynamic instabilities, making this regime highly interesting for fusion science. Additional limitations imposed on the implosion velocity, in-flight aspect ratio and applied laser power aim to further reduce instability growth, resulting in a new regime where performance can be well represented by one-dimensional (1D) hydrodynamic simulations. A simulation campaign was performed using the 1D radiation-hydrodynamics code HYADES to investigate the performance that could be achieved using direct drive implosions of liquid layer capsules, over a range of relevant energies. Results include potential gains of 0.19 on LMJ-scale systems and 0.75 on NIF-scale systems, and a reactor-level gain of 54 for an 8.5 MJ implosion. While the use of 1D simulations limits the accuracy of these results, they indicate a sufficiently high level of performance to warrant further investigations and verification of this new low-instability regime. This potentially suggests an attractive new approach to fusion energy.

Preparations for a European R&D roadmap for an inertial fusion demo reactor

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences The Royal Society 379 (2020) 20200005


Peter Norreys, Luke Ceurvorst, James Sadler, Benjamin Spiers, Marko Mayr, Naren Ratan, Alexander Savin, Kevin Glize, Raoul Trines, Bob Bingham, Matthew Hill, Nathan Sircombe, Peter Allan, Laura Hobbs, Steve James, James Skidmore, J Fyrth, J Luis, Emma Floyd, Colin Brown, Brian Haines, Re Olson, Sa Yi, Ab Zylstra, Rr Peterson


A European consortium of 15 laboratories across nine nations have worked together under the EUROFusion Enabling Research grants for the past decade with three principle objectives. These are: (a) investigating obstacles to ignition on megaJoule-class laser facilities; (b) investigating novel alternative approaches to ignition, including basic studies for fast ignition (both electron and ion-driven), auxiliary heating, shock ignition, etc.; and (c) developing technologies that will be required in the future for a fusion reactor. A brief overview of these activities, presented here, along with new calculations relates the concept of auxiliary heating of inertial fusion targets, and provides possible future directions of research and development for the updated European Roadmap that is due at the end of 2020.